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Engine-Codes – KIA – P0137 KIA

P0137 KIA Code - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2

Quick Answer

The O2 sensor, or oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases produced by the engine. Common causes include Faulty O2 Sensor: The O2 sensor itself may be faulty and not providing the correct voltage output, Wiring Issues: Damaged or corroded wiring connecting the O2 sensor to the ECM can cause a low voltage condition, Exhaust Leaks: Leaks in the exhaust system before the O2 sensor can lead to incorrect readings. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0137 KIA indicates O2 Sensor Circuit Low Voltage Bank 1 Sensor 2.
Common causes
Common causes include Faulty O2 Sensor: The O2 sensor itself may be faulty and not providing the correct voltage output, Wiring Issues: Damaged or corroded wiring connecting the O2 sensor to the ECM can cause a low voltage condition, Exhaust Leaks: Leaks in the exhaust system before the O2 sensor can lead to incorrect readings.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P0137 KIA Description

The O2 sensor, or oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases produced by the engine. This specific diagnostic trouble code (DTC) P0137 for KIA vehicles indicates that there is a low voltage condition in the O2 sensor circuit of Bank 1 Sensor 2. Bank 1 refers to the side of the engine where the Number 1 cylinder is located, and Sensor 2 indicates the downstream sensor in the exhaust system.

OBDII Code P0137 KIA - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2
P0137 KIA Code - O2 Sensor Circuit Low Voltage Bank 1 Sensor 2

Common Causes of P0137 KIA

  1. Faulty O2 Sensor: The O2 sensor itself may be faulty and not providing the correct voltage output.
  2. Wiring Issues: Damaged or corroded wiring connecting the O2 sensor to the ECM can cause a low voltage condition.
  3. Exhaust Leaks: Leaks in the exhaust system before the O2 sensor can lead to incorrect readings.
  4. Vacuum Leaks: Vacuum leaks in the engine can affect the O2 sensor's readings and cause a low voltage condition.
  5. ECM Malfunction: In rare cases, a malfunctioning engine control module can also trigger this code.

Symptoms of P0137 KIA

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Poor Fuel Economy: A malfunctioning O2 sensor can lead to incorrect fuel mixture ratios, causing the engine to run rich or lean, resulting in decreased fuel efficiency.
  3. Rough Idle: The engine may experience rough idling or hesitation when the O2 sensor is not functioning properly.
  4. Failed Emissions Test: If the O2 sensor issue is not addressed, it can lead to increased emissions, potentially causing the vehicle to fail emissions tests.
  5. Engine Misfires: In some cases, a faulty O2 sensor can contribute to engine misfires or lack of power during acceleration.

How to Fix P0137 KIA

  1. Diagnostic Testing: Use a scan tool to read the code and diagnose the specific issue with the O2 sensor circuit.
  2. Check Wiring: Inspect the wiring harness for any damage or corrosion, and repair or replace as necessary.
  3. Replace O2 Sensor: If the sensor is determined to be faulty, replace Bank 1 Sensor 2 with a new O2 sensor.
  4. Clear Codes: After completing the repair, clear the DTC and reset the Check Engine Light.
  5. Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the O2 sensor is now functioning correctly.

Cost to Fix P0137 KIA

The cost of repairing a P0137 DTC for a KIA vehicle can vary depending on the specific model, the location of the repair shop, and the cost of parts and labor. On average, the cost of replacing an O2 sensor can range from $150 to $400, including parts and labor. Keep in mind that additional diagnostic time and labor fees may apply, so it's recommended to check with local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0137 KIA

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.

When is the Code Detected?

The P0137 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor signal voltage remains excessively low for an extended period of time.

Need more information about the P0137 KIA code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0137 KIA Code

1. What are the common symptoms of OBDII code P0137 in a KIA, which indicates an O2 sensor circuit low voltage for Bank 1 Sensor 2?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P0137 in a KIA?

- The code may be triggered by a faulty O2 sensor, damaged wiring or connectors in the O2 sensor circuit, exhaust leaks, or a malfunctioning ECM.

3. How does the O2 sensor Bank 1 Sensor 2 work in a KIA vehicle?

- Bank 1 Sensor 2 is located after the catalytic converter and monitors the oxygen levels in the exhaust gases to ensure the proper functioning of the catalytic converter.

4. Can a dirty or contaminated O2 sensor cause the P0137 code in a KIA?

- Yes, a dirty or contaminated O2 sensor can lead to inaccurate readings and trigger the low voltage code P0137. Cleaning or replacing the sensor may resolve the issue.

5. What are some repair tips for addressing OBDII code P0137 in a KIA?

- Start by inspecting the O2 sensor wiring and connectors for damage or corrosion. Check for exhaust leaks and verify proper sensor operation. Clear the code and see if it returns.

6. Is it safe to continue driving a KIA with the P0137 code illuminated?

- While the vehicle may still be operable, it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

7. How can I reset the Check Engine Light after repairing the O2 sensor circuit low voltage issue in my KIA?

- You can reset the Check Engine Light using an OBDII scanner or by disconnecting the car battery for a few minutes. The light should turn off if the repair was successful.

8. Does the P0137 code in a KIA always indicate a faulty O2 sensor?

- Not necessarily. While a faulty O2 sensor is a common cause, other factors like wiring issues, exhaust leaks, or ECM problems can also trigger the code and should be investigated.

9. Can I drive my KIA with the P0137 code temporarily until I can have it repaired?

- It is generally safe to drive the vehicle for a short distance with the code, but prolonged driving with a malfunctioning O2 sensor can lead to reduced fuel efficiency and potential engine damage.

10. How can I prevent the recurrence of OBDII code P0137 in my KIA after repairing it?

- Regular maintenance, including checking and cleaning the O2 sensor, inspecting the wiring, and addressing any exhaust leaks, can help prevent the code from reoccurring.

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